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January 0 is an alternative name for December 31. [1]

9 relations: December 31, Ephemeris, Epoch (astronomy), February 30, Microsoft, Microsoft Excel, Newcomb's Tables of the Sun, System time, United States Naval Observatory.

December 31

It is widely known as New Year's Eve since the following day is New Year's Day.

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In astronomy and celestial navigation, an ephemeris (plural: ephemerides; from Latin ephemeris, "diary", from Greek ἐφημερίς, ephēmeris, "diary, calendar") gives the positions of naturally occurring astronomical objects as well as artificial satellites in the sky at a given time or times.

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Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

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February 30

February 30 occurs in some calendars but not in the Gregorian calendar, where February contains only 28 or, in a leap year, 29 days.

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Microsoft Corporation (commonly referred to as Microsoft) is an American multinational technology company headquartered in Redmond, Washington, that develops, manufactures, licenses, supports and sells computer software, consumer electronics and personal computers and services.

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Microsoft Excel

Microsoft Excel is a spreadsheet application developed by Microsoft for Microsoft Windows,, and iOS.

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Newcomb's Tables of the Sun

Newcomb's Tables of the Sun is the short title and running head of a work by the American astronomer and mathematician Simon Newcomb entitled "Tables of the Motion of the Earth on its Axis and Around the Sun" on pages 1–169 of "Tables of the Four Inner Planets" (1895), volume VI of the serial publication Astronomical Papers prepared for the use of the American Ephemeris and Nautical Almanac.

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System time

In computer science and computer programming, system time represents a computer system's notion of the passing of time.

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United States Naval Observatory

The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing (PNT) for the United States Navy and the United States Department of Defense.

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Redirects here:

0 January, January 0th, January Zero, January Zeroth.


[1] https://en.wikipedia.org/wiki/January_0

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